Carburetor attachment



Sept. 12, 1933. J. E. MICHAELS CARBURE TOR ATTACHMENT Filed July 26, 1930 2 Shets-Sheet l 2 SheetsSheet 2 J. E. MICHAELS CARBURETOR ATTACHMENT Filed July 26, 1950 Sept. 12, 1933.

Patented Sept. 12, 1933 r UNITEDSTATESQPATENT OFFICE 1 Application July 26, 1930. Serial No. 171,008 '7 Claims. (01. 48-180)- This invention is an attachment for carburetors of the type commonly employed in producing the explosive mixture for an internal combustion engine. It is well known that carburetors of the 5 type now generally in usein connection with explosive engines, while possessing a relatively high type of efiiciency, have not attained the stage of development by which perfect combustion of the explosive mixture is obtainable. One of the objects of the present invention is to pro vide simple means for producing a more perfect explosive mixture than is usually obtainable by the standard type carburetors, the same being primarily designed to supplement the usual operation of the carburetor, but not limited in thisparticular. A further object'is toprovide means of the character mentioned capable of greatlyimproving the operation of ,an internal combustion engine byinsuring a more nearly perfect combustion than has heretofore been obtainable in ordinary practice, thereby making it "possible to obtain a maximum of power with a minimum expenditure of fuel, and at the same time to secure exceedingly smooth engineopera tion, and to also eliminate many of the common ills usually encountered, such as accumulation of carbon, crank case dilution, and the like. A further object is to provide means for automatically varying the volume of the explosive mixture in accordance withthe demands of the engine,'i. e. to conform to changes in the operation of the engine due to variations in load and speed. The invention will be hereinafter fully set forth and particularly pointed out in the claims. In the accompanying drawings:'

Figure l is a perspective view illustrating a carburetor attachment embodying the-features of the invention. Figure 2 is a vertical sectional view. Figure 3 is a detail view illustrating one of the mixer tubes. Figure 4 is a detail view of one of the bristle-like mixing members; Figure 5 is a transverse view illustrating a slight modificationof one-of the'mixing' members. Figure 6 isf'a longitudinal sectional viewfillustrating' a modified-form of the'carburetor attachment;

Referringto the drawings, C designates a casing which is divided bya horizontal wall' 10 into a receiving chamber 11 and a discharge chamber 12, the receivng chamber being connected by a "suitable conduit 13-withthe delivery conduit oi a standard typecarburetor (n ot shown') The discharge chamber; 12 is connected by means of an outlet conduit 14 leading to the manifold of the engine (not shown). It will be' noted that the inlet chamber 11- is somewhat larger than the discharge chamber .12, so as to provide a rearwardlyiprojected portion 11 The inlet chamber 11 is connected with the outlet chamber 12 by a plurality of mixing conduits, any number of which may be employed, but for'purposes of illustration, three conduits 15, 1'6 and 17 are shown. The inletleg of each conduit 15 and v1'7 is provided with an. enlargement 18, threaded near its lower end to removably engagea correspondingly threaded boss 19, extending upwardly from the chamber 11. Said leg is also provided with a reduced portion 20 at its lower end, internally threaded as indicated; and extended to a position near the'bottom of the chamber 11. Each of said conduits 15 and 17 is provided with a downwardly extended outlet leg 21 connected with the inlet leg at the. top, and discharging into the outlet chamber 12; The conduits are made in" sections, as shown in the drawings so that the upper portions may be read- 5 ily separated from the rest :for reasons to "be later described. v p

The conduits 15 and 17 are each provided with valve seat members 22, located within the en largements 18, each' of said members 22 consisting of a cage-like body provided with slots 23 in its wall, and having a lower threaded portion engaging the internal threads of the extension 20. The lower ends of said members'22are provided with valve seats 24, upon which rest valves 25which may be of any desired or suit-. able construction. As shown in Figure -2, the" valves consist of solid gravity-seated plungers from which a portion of the metal has been removed. to control theweight, the valve 25 for theconduit 15 being somewhat heavier than the corresponding valve for the conduit '17. The conduit 16' differs from the other two only in that the enlargement 18, valve seat member 22', and valve 25, are omitted." v

Extending through the legs or the conduits 15, 16 and 1-7, are brush-likemixing members M, as more clearly shownin Figure 2. These mixing members are of brush-like construction in which a plurality of bristles26' are secured to a central'stem or core 27 in any suitable or desired mannenthe length of the bristles being such that the ends-thereof bear against or, at least touch the adjacent surfaces of the walls of the conduits. It will be observed that the lower end of the corell, as shown in Figure 2, rests upon the top of the valve seat cage 22;and. as shown in Figure 3 the stems rest upon the lower walls of the respective chambers 11 and12. As

'shownflthebristles are twisted in a wire core or holder 27 so as to assume an approximately spiral form, as clearly shown in the detail view of Figure 4. Said bristles may be of any desired cross section, i. e. round, triangular, or other polygonal shape. The passage through conduit 16 is normally uninterrupted except for the employment of the mixer members M, no valve 25 being employed because the conduit 16 is that which normally supplies the explosive mixture to theiengine for the idling speed.

It is to be understood that there is no intent to limit the device to conduits of any specified diameter, because the required diameter will vary with the size and type of engine to which the invention is connected- It is possible, however, that the diameter might be so great that the length of the bristles attached to the mixing member will be such that they will be too widely separated at their free extremities to produce an adequate mixing function. structure illustrated in. Figure 5 is employed. Referringto said figure, the mixing member of Figure Bis employed but the same is surrounded by a supplemental mixingmemb'er M which is provided with inwardly extended bristles 27 which are so positioned as to fillin the gaps between the diverging cnds of the bristles 25.

If desired, a .supplementary air valve may be employed upon conduits 15 and 17, as indicated at V, Figure 2.. This supplementary air valve comprises a chamber 30 having an air inlet opening 31 and a discharge conduit 32 leading into the inlet leg of the mixer conduits. A gravity valve 33 normally closes the inlet opening 31.

In operation, assuming the conduit 13 to be connected with a standard type carburetor and the conduit l lwith the manifold, the engine is v started in the usual way, the parts of the device at that time being so positionedthat the valves of both of theconduits 15 and 17 are normally seated, the fuel demands created by the. idling of the engine being fully met by the passage of the mixture from the carburetor into the cham ber 11 through the mixing conduit 16,-to the outlet chamber 12, and through conduit 14 to the engine. As themixture passes through the conduit 16, the gas and air constituents encounter the bristles of the mixing members M and are subjected to tremendous agitation as they pass around the bristles during their travel. The result is that the mixture of air and gasoline vapor which is initiated by the carburetor is moreperfectly eifected, so that when the mixture reaches the engine its constituents have been so completely combined that an approximately perfect explosive mixture isassured. As the speed of the engine picks'up, the lighter of the twovalves 25 is unseated and the supply of mixture through the conduit 16 is supplemented by an additional supply throughthe conduit 17, said initial mixture from the carburetor'being treated in identically the same manner, as the mixture which passes through the conduit 16, with the result that a highly perfect additional mixture goes to the manifold; In a similar manner as the de-; mands of the engine are increased the heavier valve 25 in the conduit 15 is unseated,,and the additional mixing functions of the conduit 15 are obtained; It is to be understood that-the length. of the mixer M maybe increased or diminished to suit varying types of engines and conditions of operation, without departing from the spirit of the invention.

Under some conditions, it mayv be necessary to supply additional air andthis isprovidedfor by In this event, the

the valve V, although it is to be understood that this valve may be omitted if desired.

In lieu of employing the various conduits 15,

16 and 17, the mixing member M may be placed directly in the manifold or if desired, between the carburetor and the manifold by an arrangement such as illustrated in Figure 6. Referring to the last mentioned figure, 35'designates a con- 7 duit having flanges 36 and 37 respectively by means of which it may be attached to the carburetor (not shown) and the manifold (not shown) respectively. Or, as above intimated,

" said conduit may in fact be a part of the manifold. Located within said conduit 35 is a mixer member M constructed as already described. In the operation of this form of the device, the

mixture passing from the carburetor to the manifold'is subjected to the bafiling, beating and whirling actionwhich is accomplished in the structure illustratedin the other figures of the drawings and of coursethe conduit 35 may be made of any desired length.

The advantages of the invention will be readily I understood by those skilledin the art to which it belongs. It will be readily understood for instance, that by means of the bafiling and beating action'against the vapor and air constituents as they travel around the fibers of the brush-like mixer, a highly perfect combustible mixture is produced and said constituents'are more completely intermingled than they were atthe time they were discharged from the carburetor., This more perfect intermixture of the explosive constituents necessarily insures a more perfect combustion of the mixture during the operation of the engine, thereby insuring a maximum of power with a minimum expenditure of fuel. It

obviously follows that by obtaining the more perfect combustion referred to, a "much smoother engine operation is also obtainable and at the same time there is a practical elimination of carbon accumulation, crank case dilution, climination of carbonmonoxide, and the like. Anothenadvantage is that by constructing the con duits insections as shown, the sections may be separated to facilitate insertion, of the mixing members, valves, etc.

,It is to be understood that although the invention has been'illustrate'd and described for use in connection with a standard type internal combustion engine, it is not limited to such use. For instance, it is not only capable of use in connection with motor vehicle and airplane engines, but also with oil burners, and any other mechanism which employs a combustible mixture of fuel vapor and air.

Having thus explained the nature of the invention and described an operative manner of conattempting to set forth all of the forms in which structingand using the-same, although without it may be made, or all of theforms of its use,

necting said chambers, mixing members extended longitudinally through said conduits, and. valves controlling admission of mixture to certain'of said conduits, said valves being arranged to operatein a predetermined sequence.

.2. An attachment for carburetors comprising.

means providing an inlet chamber having a mixture inlet and a superposed discharge chamber having a mixture outlet, a conduit of approximately U-shape located exteriorly of said casing and having one end connected with the top of said inlet chamber and the other end connected with the top of the outlet chamber, and a mixing member extending longitudinally through one leg of said conduit a substantial distance and provided with radially disposed fiber-like bafile members approximately filling the cross sectional area of said conduit.

3. An attachment for carburetors comprising a casing divided into superposed chambers, the lower chamber having a portion extended beyond the upper chamber, said lower chamber having a mixture inlet and said upper chamber having a mixture outlet, a conduit of approximately U- ber and a mixture discharging chamber, said receiving chamber having an inlet and said dischargechamber having an outlet, a conduit of approximately U-shape located exteriorly of said casing and having a receiving end connected nected with the other chamber, a cage-like valve seat member located in the receiving end of said conduit, a check valve slidably mounted within said valve seat member and constructed and arranged to be unseated by the suction of the engine, and a mixing member extending longitudinally through said conduit a substantial distance and provided with radially disposed fiberlike baiile members approximately filling the cross sectional area of said conduit, said mixing member resting upon said valve seat member.

5. An attachment for carburetors comprising an inlet opening and a discharging chamber hav- 7 in the conduit. with the inlet chamber and a discharge end connected with the discharge chamber, a check valve normally controlling thef pas sage of mixture from the receiving chamber, into said conduit, a mixing member extending longitudinally through one leg of said conduit a substantial distance and provided with radially disposed fiber like baffie members approximately filling the cross sectional. area of said conduit, and an auxiliary valve controlling admission of air to said conduit at a position between said mixing member and said discharging chamber.

6. An attachment for carburetors comprising a casing divided into a receiving chamber having ing an outlet opening, a conduit of approximate,- ly inverted U-shape located exteriorly of said casing and having a receiving leg connected with the receivingchamber and a discharging leg connected with said discharging chamber, a check valve Within'said receiving leg and normally controlling the admission of mixture to said conduit, a mixing member also located in the receiving a leg and extending longitudinally therethrough a substantial distance, said mixing member being provided with'radially disposed fiber-dike baffle members approximately filling the cross sectional area of the conduit, an auxiliary air inlet casing communicating with said conduit between said baffle member and the discharge leg of the conduit, and a valve in said auxiliary air inlet casing controlling, admission of auxiliary air to said conduit, said auxiliary valve being constructed and arranged to be operated by the suction with- 7. An attachment 'ior'carburetors comprising a casing having two superposed non-communi- .outlet chamber having a discharge opening, a

plurality of conduits of approximately 'U-shape located exteriorly' of said casing and each having one end removablyconnected with. the top wall of the lower chamber and the other end removably connected with the top wall of the upper chamber, and mixing members within the said conduits and extending longitudinally through one leg of each of said conduits a substantial distance, said mixing members being provided with radially disposed fiber-like baflie means approximately filling the cross sectional area of the conduit.

JOHN E. MICHAELS.- 

